the root (no rank)
Bacteria (domain)
Proteobacteria (phylum)
Gammaproteobacteria (class)
Pasteurellales (order)
Pasteurellaceae (family)
Aggregatibacter (genus)
[hide inferior taxa]
Aggregatibacter actinomycetemcomitans (species)
Aggregatibacter aphrophilus (species)
Aggregatibacter segnis (species)